I am selling my used Nokia 5165 and Nokia 6185, but someone told me that I have to unlock them first. What does "unlock" mean and how do I do it? I used Cingular for the 5165 and MCI for the 6185. PLEASE HELP ME
Unlocking a phone is basically to "unmarry" it from a particular carrier. AT&T locks their phones so you can only activate it with them and not any other TDMA carrier. If you bought the 5165 from Cingular it is probably unlocked already. Cingular is not in the practice of locking phones. If you bought it from AT&T you bet it is locked. About the 6185, it may or may not be locked depending on the carrier's business practices. Unlocking a phone is not imperative to sell it. You can still sell a locked phone. The phone companies don't like to unlock their phones so it is unlikely they will do it for you, so you would have to pay some hacker guy to unlock it. However, you may sell your locked phone to someone else who wishes to use the same carrier it is "married" or locked to. It is rare to find anyone who wouldn't want to use a particular phone on the network it is locked to.
For the 6185 the easiest way to tell if it is locked is to dial *#639# if it asks for a phone number, it is unlocked, if it asks for a service programing code it is locked.
in my experiance, cingular locks all of there gsm phones, and most of the 5100 series phones are locked as well. i will admit i have seen 6100 series not locked by cingular, but very few as it depends on what distribution center it was origanally shipped from